Questions and postings pertaining to the usage of ImageMagick regardless of the interface. This includes the command-line utilities, as well as the C and C++ APIs. Usage questions are like "How do I use ImageMagick to create drop shadows?".
The solution to the problem is to strip the MediaBox from the PDF or edit the ImageMagick source, coders/pdf.c. Remove the MediaBox check from ReadPDFImage() and rebuild/reinstall. Alternatively you can download ImageMagick 6.2.6-4 Beta within a few days and add this to your command line:
Yes you can use Ghostscript to convert directly to JPEG. See the Ghostscript forums to determine how this is done. Add -verbose to your convert command to see the options ImageMagick passes to Ghostscript.